Medium severity5.9NVD Advisory· Published Dec 28, 2020· Updated Jun 17, 2026
CVE-2020-26569
CVE-2020-26569
Description
In EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindings and as a result packets can be incorrectly forwarded across VLAN boundaries. This can result in traffic being discarded on the receiving VLAN. This affects versions: 4.21.12M and below releases in the 4.21.x train; 4.22.7M and below releases in the 4.22.x train; 4.23.5M and below releases in the 4.23.x train; 4.24.2F and below releases in the 4.24.x train.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*range: >=4.21.0f,<=4.21.12m
- (no CPE)range: 4.21.12M and below releases in the 4.21.x train; 4.22.7M and below releases in the 4.22.x train; 4.23.5M and below releases in the 4.23.x train; 4.24.2F and below releases in the 4.24.x train
- Arista/EOSdescription
Patches
Vulnerability mechanics
References
1- www.arista.com/en/support/advisories-notices/security-advisories/11997-security-advisory-57nvdExploitVendor Advisory
News mentions
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